CN106817194A - Reference signal sending method, method of reseptance and equipment - Google Patents

Reference signal sending method, method of reseptance and equipment Download PDF

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Publication number
CN106817194A
CN106817194A CN201510866670.6A CN201510866670A CN106817194A CN 106817194 A CN106817194 A CN 106817194A CN 201510866670 A CN201510866670 A CN 201510866670A CN 106817194 A CN106817194 A CN 106817194A
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China
Prior art keywords
reference signal
resource block
link
physical resource
channel
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Granted
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CN201510866670.6A
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CN106817194B (en
Inventor
钱辰
孙鹏飞
喻斌
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Beijing Samsung Telecom R&D Center
Beijing Samsung Telecommunications Technology Research Co Ltd
Samsung Electronics Co Ltd
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Beijing Samsung Telecommunications Technology Research Co Ltd
Samsung Electronics Co Ltd
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Application filed by Beijing Samsung Telecommunications Technology Research Co Ltd, Samsung Electronics Co Ltd filed Critical Beijing Samsung Telecommunications Technology Research Co Ltd
Priority to CN201510866670.6A priority Critical patent/CN106817194B/en
Priority to US15/361,910 priority patent/US11018826B2/en
Priority to EP16871022.6A priority patent/EP3338419B1/en
Priority to KR1020187006803A priority patent/KR102568187B1/en
Priority to PCT/KR2016/013941 priority patent/WO2017095126A1/en
Publication of CN106817194A publication Critical patent/CN106817194A/en
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Publication of CN106817194B publication Critical patent/CN106817194B/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0417—Feedback systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0691—Hybrid systems, i.e. switching and simultaneous transmission using subgroups of transmit antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
    • H04L25/023—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols
    • H04L25/0232—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols by interpolation between sounding signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2668—Details of algorithms
    • H04L27/2673—Details of algorithms characterised by synchronisation parameters
    • H04L27/2675—Pilot or known symbols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)

Abstract

This application discloses a kind of reference signal sending method, the method includes：Sending ending equipment inserts at least one between the first adjacent Physical Resource Block is used to reduce the Physical Resource Block of reference signal expense；Sending ending equipment transmits first Physical Resource Block and the Physical Resource Block for reducing reference signal expense.Disclosed herein as well is for the sending method of reference signal, method of reseptance, sending ending equipment and receiving device in the Physical Resource Block for reducing reference signal expense.Using technical scheme disclosed in the present application, the method that can effectively reduce training expense reduces the expense caused by down physical channel training, improves the spectrum efficiency of system.

Description

Reference signal sending method, method of reseptance and equipment
Technical field
The application is related to wireless communication technology field, more particularly to reference signal sending method, method of reseptance and its equipment.
Background technology
The fast development of information industry, especially from mobile Internet and Internet of Things (IoT, internet of Things increased requirement), unprecedented challenge is brought to future mobile.Such as according to International Telecommunication Union ITU Report ITU-R M. [IMT.BEYOND 2020.TRAFFIC], it is contemplated that to the year two thousand twenty, mobile service amount increases relative (the 4G epoch) in 2010 will increase nearly 1000 times, user equipment connection number also will more than 17,000,000,000, with magnanimity IoT equipment by Mobile communications network is gradually penetrated into, connection number of devices will be more surprising.In order to tackle this unprecedented challenge, communications industry circle Extensive 5th third-generation mobile communication technical research (5G) is expanded with academia, towards the year two thousand twenty generation.At present in the report of ITU Accuse in ITU-R M. [IMT.VISION] discussing the framework and overall goals in future 5G, wherein the demand to 5G look forward to, Application scenarios and every important performance indexes are elaborated.For the new demand in 5G, the report ITU-R M. of ITU [IMT.FUTURE TECHNOLOGY TRENDS] provides the relevant information for 5G technological trends, it is intended to solve system throughput Amount is obviously improved, Consumer's Experience uniformity, autgmentability are to support IoT, time delay, efficiency, cost, network flexibility, emerging service Support and the prominent question such as flexible spectrum utilization.
Multiple-input and multiple-output (Multiple-input multiple-output, MIMO) technology is to improve system spectrum effect The important means of rate.Because multi-antenna technology can effectively improve system data rate, improve system link stability, it by It is widely used in the Voice ＆ Video field of broadcast type and commercial signal communication system, for example 3G (Third Generation) Moblie cooperation group With the Evolved Universal Terrestrial wireless access that project (3rd Generation Partnership Project, 3GPP) is formulated (Evolved Universal Terrestrial Radio Access, E-UTRA) corresponding Long Term Evolution (Long of agreement Term Evolution, LTE) system, the second generation digital video (Digital Video Broadcasting, DVB) in Europe, With IEEE802.16 worldwide interoperability for microwave accesses (World Interoperability for Microwave Access, WiMAX) etc..MIMO technology sets up communication link by between the different antennae of sending and receiving end, can increase for system provides space diversity Benefit and spatial multiplex gains.By the way that in different link transmission identical data, MIMO technology improves the reliability of transmission data, So as to obtain diversity gain；By the way that in the different data of different link transmissions, MIMO technology can not increase transmission bandwidth On the premise of improve system spectrum efficiency, so as to improve transmission data rate.By the channel condition information of transmitting terminal, MIMO skills Art can also by with coding come simultaneously, same frequency service multiple users, improve the overall spectrum efficiency of system.At present, MIMO skills Art can be good at supporting mobile broadband (Mobile Broadband, the MBB) business demand in 4G epoch as key technology. In 5G, the demand of spectrum efficiency, energy efficiency and data transfer rate will be lifted further, and existing MIMO technology is difficult to meet data The significant increase of rate.Therefore the evolution technology of MIMO technology：Extensive MIMO has obtained the extensive concern of academia and industrial quarters. By configuring in transmitting terminal the antenna far more than number of users, extensive MIMO technology can obtain bigger ARRAY PROCESSING gain While (thinner wave beam), bigger spatial degrees of freedom is also obtained, can be complete by user by simple linear operation Distinguish, hence in so that spectrum efficiency further obtains tremendous increase with energy efficiency.But in practical application scene, MIMO Technology also encounters some problems with extensive MIMO technology, for example：
Whether 1.MIMO technologies are effective, reliable, depend on whether transmitting terminal is obtained in that accurate channel condition information.If The channel condition information of transmitting terminal is not accurate enough, can cause being remarkably decreased for system gain.Current MIMO technology depends on base In the channel estimation and feedback of reference signal, and when antenna number increases, the reference signal expense brought with feedback will The serious spectrum efficiency for reducing system.
2. the synchronous requirement between antenna is strict.
3. receiving terminal needs to process the interference between antenna.
Although 4. multiuser MIMO can improve the overall spectrum efficiency of cell, for unique user spectrum efficiency Improve then helpless.
Used as a branch of MIMO technology, spatial modulation (Spatial Modulation, SM) is learned in recent years The extensive concern of art circle.Be used for for a part of information bit to select transmission antenna by SM technologies, and transmission is using only an antenna every time. By using antenna index as the additional carrier of transmission information, three-dimensional constellation being constructed on the basis of conventional two-dimensional planisphere Figure such that it is able to obtain the spectrum efficiency higher than a single aerial system.SM technologies also solve the one of traditional MIMO technology simultaneously A little problems.For example, because transmission every time is using only single antenna, SM technologies do not need receiving terminal carry out it is synchronous between the antenna of complexity and The elimination disturbed between link, greatly simplify the treatment of receiving terminal；SM technologies can increase the spectrum efficiency of unique user, therefore Being more suitable for some needs to improve the scene of unique user data transfer rate；SM technologies need not carry out precoding in transmitting terminal, therefore Receiving terminal need not be fed back；Transmitting terminal only needs a radio frequency link, greatly reduces the expense of transmitting terminal.Based on multicarrier SM technologies although lose the advantage of single radio frequency link, but time frequency two-dimensional resources be assigned as system provide it is higher The free degree, while the frequency selective fading caused to multipath also has more preferable robustness.
The advantage of SM technologies causes that it obtains extensive concern in Communication Studies, but itself some intrinsic lacks Point causes that its application in a wireless communication system there is also many challenges, and the challenge that these are badly in need of solving is continuous In research.One of problem is reference signal design and channel estimation.SM technologies reach receiving terminal by distinguishing different antennae Channel condition information differentiate the antenna index of transmission, it is therefore desirable to receiving terminal known channel state information.In existing standard Reference signal and channel training scheme, such as cell special reference (Cell-specific in LTE-A Reference Signal, CRS) can support that transmitting terminal is equipped with 4~8 days with channel state information reference signals (CSI-RS) The mimo system of line, but when antenna number of starting is more, continuing to use traditional RS designs will cause larger expense, cause be The reduction of spectrum efficiency of uniting.
In sum, the competitiveness for lifting multicarrier space-modulation technique in 5G candidate technologies, it would be desirable to be directed to The larger problem of space-modulation technique downlink reference signal expense proposes solution, with reducing multicarrier spatial modulation system Expense caused by down physical channel training, improves the spectrum efficiency of system.
The content of the invention
The technical problems to be solved by the invention are down physical channel training expenses in multicarrier spatial modulation system Problem, there not yet have a kind of very effective method at present to be larger come descending training expense in reducing multicarrier spatial modulation system Problem.Therefore, this application provides the method and apparatus for effectively reducing training expense, down physical channel training institute can be reduced The expense for causing, improves the spectrum efficiency of system.
This application discloses a kind of reference signal sending method, methods described includes：
Sending ending equipment inserts at least one for reducing reference signal expense between the first adjacent Physical Resource Block Physical Resource Block；
Sending ending equipment transmits first Physical Resource Block and the physical resource for reducing reference signal expense Block.
Preferably, in the Physical Resource Block for reducing reference signal expense, in the following ways at least one Planting reduces reference signal expense：
Sending ending equipment sends the reference signal for channel estimation in the first link subset of transmission link, and in transmission Second link subset of link sends spatial modulation symbol；Wherein, described being sent on identical running time-frequency resource is carried out, also, First link subset includes at least one transmission link in whole transmission links, and the second link subset includes whole transmission links In at least one transmission link；
Sending ending equipment will be divided into two parts running time-frequency resource for reducing the Physical Resource Block of reference signal expense, by first Portion of time frequency resources is updated for channel estimation, and Part II running time-frequency resource is used for into the supplement that channel estimation updates.
Preferably, the method also includes：
Sending ending equipment provides the position of default first Physical Resource Block with for reducing the physics of reference signal expense The insertion frequency of source block is sent to receiving device；
And/or, sending ending equipment is by first Physical Resource Block and Physical Resource Block for reducing reference signal expense Position is sent to receiving device.
Preferably, the method also includes：
From receiving device receiving channel state information, and determined to be opened for reducing reference signal according to channel condition information The insertion frequency of the Physical Resource Block of pin；
And/or, from receiving device receive for indicate insertion the first Physical Resource Block configured information, it is described at least The first Physical Resource Block is inserted between one Physical Resource Block for reducing reference signal expense and is sent to receiving terminal and indicated The between described at least one being used to reduce the Physical Resource Block of reference signal expense after information, or the time of interval setting One Physical Resource Block.
Preferably, the insertion that the Physical Resource Block for reducing reference signal expense is determined according to channel condition information Frequency includes：
If channel variation is faster than first threshold set in advance, inserted for reducing reference using the first insertion frequency The Physical Resource Block of signal overhead；If channel variation is slower than Second Threshold set in advance, inserted using the second insertion frequency Enter the Physical Resource Block for reducing reference signal expense；Wherein, the first insertion frequency is less than or equal to the second insertion frequency.
Disclosed herein as well is a kind of sending ending equipment, including：Insertion module and sending module, wherein：
Insertion module, opens for the insertion at least one between the first adjacent Physical Resource Block for reducing reference signal The Physical Resource Block of pin；
Sending module, provides for transmitting first Physical Resource Block and the physics for reducing reference signal expense Source block.
Disclosed herein as well is a kind of reference signal receiving method, including：
Receiving device receives the first Physical Resource Block and the position for reducing the Physical Resource Block of reference signal expense Information；
Physical resource of the receiving device according to the first Physical Resource Block for receiving and for reducing reference signal expense Block carries out channel estimation；
Receiving device carries out Data Detection according to channel estimation results.
Preferably, the method also includes：Receiving device decides whether to be sent out to sending ending equipment according to channel estimation results Send the configured information for indicating the first Physical Resource Block of insertion.
Preferably, if the result of channel estimation shows that channel variation is faster than threshold value set in advance, receiving device to Sending ending equipment sends the configured information for indicating the first Physical Resource Block of insertion.
Preferably, the method also includes：Receiving device receives configured information and knows that the first physics is provided from sending ending equipment The insertion of source block, and start to detect the first Physical Resource Block；Or, receiving device is sent for indicating to sending ending equipment After the configured information of the first Physical Resource Block insertion, start to detect the first Physical Resource Block after being spaced the time of setting.
Preferably, the time of the setting determines according at least one of following information：Radius of society, receiving device with The processing speed of sending ending equipment.
Disclosed herein as well is a kind of receiving device, including：Receiver module, channel estimation module and Data Detection mould Block, wherein：
The receiver module, the Physical Resource Block for the first Physical Resource Block of reception and for reducing reference signal expense Positional information；
The channel estimation module, for according to the first Physical Resource Block for receiving and for reducing reference signal expense Physical Resource Block carry out channel estimation；
The data detection module, for carrying out Data Detection according to channel estimation results.
Preferably, also including indicating module in the equipment；
The indicating module is used for according to current channel estimation, decides whether to be sent for indicating the to sending ending equipment The configured information of one Physical Resource Block insertion.
Disclosed herein as well is a kind of sender of reference signal in Physical Resource Block for reducing reference signal expense Method, including：
Sending ending equipment sends the reference signal for channel estimation in the first link subset of transmission link, and in transmission Second link subset of link sends spatial modulation symbol；
Wherein, described being sent on identical running time-frequency resource is carried out, also, the first link subset includes whole transmission links In at least one transmission link, the second link subset includes at least one transmission link in whole transmission links.
Preferably, the first link subset and the second link subset non-overlapping.
Preferably, sending ending equipment sends reference signal using mutually orthogonal resource in the first link subset, it is described Resource includes at least one of following resource：Time resource, frequency resource, orthogonal code sequence resource.
Preferably, the method also includes：Sending ending equipment from receiving device receiving channel state information, and according to channel Status information determines the number of links that the first link subset is included respectively with the second link subset.
If preferably, channel variation is faster than first threshold set in advance, the first link subset and the second link subset In include the first number of links；If channel variation is slower than Second Threshold set in advance, the first link subset and the second chain way Concentrate and include the second number of links, wherein the first number of links is less than the second number of links.
Disclosed herein as well is a kind of sending ending equipment, including：Reference signal sending module and modulation symbol sending module, Wherein：
The reference signal sending module, for sending the ginseng for channel estimation in the first link subset of transmission link Examine signal；
The modulation symbol sending module, spatial modulation symbol is sent for the second link subset in transmission link；
Wherein, the reference signal sending module and modulation symbol sending module carry out signal on identical running time-frequency resource Send, also, the first link subset includes at least one transmission link in whole transmission links, the second link subset includes complete At least one transmission link in portion's transmission link.
Disclosed herein as well is a kind of reference signal receiving method, including：
Receive the first Physical Resource Block and the Physical Resource Block for reducing reference signal expense；
According to receiving signal, and the channel estimation results from the Physical Resource Block of preceding n times first or front and rear N1 frames the The result that one Physical Resource Block channel estimation interpolation is obtained, obtains the rough estimate of present channel, and extract spatial modulation symbol Hop；Wherein, N is more than or equal to 1 more than or equal to 1, N1；
Spatial modulation symbol transmission part to obtaining carries out spatial modulation detection, obtain transmission link index estimation with And the estimation of data symbol；
The estimation of estimation and data symbol according to link index, reference signal and signal is received, update corresponding chain The channel estimation on road.
Disclosed herein as well is a kind of receiving device, including：Data extraction module, data detection module and channel estimation Module, wherein：
Data extraction module, for according to reception signal, and the channel estimation knot from the Physical Resource Block of preceding n times first The result that fruit or front and rear the first Physical Resource Block of N1 frames channel estimation interpolation are obtained, obtains the rough estimate of present channel, and carry Take out spatial modulation symbol transmission part；Wherein, N is more than or equal to 1 more than or equal to 1, N1；
Data detection module, the spatial modulation symbol transmission part for being obtained to data extraction module carries out spatial modulation Detection, obtains the estimation of transmission link index and the estimation of data symbol；
Channel estimation module, for indexed according to data detection module link estimation and the estimation of data symbol, Reference signal and reception signal, update the channel estimation of respective link.
Disclosed herein as well is a kind of sender of reference signal in Physical Resource Block for reducing reference signal expense Method, including：
Sending ending equipment will be divided into two parts running time-frequency resource for reducing the time/frequency source block of reference signal expense；
Sending ending equipment updates Part I running time-frequency resource for channel estimation, and Part II running time-frequency resource is used for The supplement that channel estimation updates.
Preferably, Part I running time-frequency resource and Part II running time-frequency resource non-overlapping.
Preferably, sending ending equipment is on Part I running time-frequency resource, only transmission space modulation symbol.
Preferably, the method also includes：The spatial modulation symbol transmitted on sending ending equipment statistics Part I running time-frequency resource Number link and access times that are used, determine to be used for the link set for transmitting symbol on Part II running time-frequency resource accordingly Close.
Preferably, the method also includes：Sending ending equipment is used the link that is used on Part I running time-frequency resource Number of times carries out ascending order arrangement, is provided for Part II time-frequency according to the access times link of sequential selection at least one from less to more The transmission of symbol on source.
Preferably, the method also includes：Sending ending equipment determines according to the channel condition information that receiving device feeds back The size of two portion of time frequency resources, and notify receiving device.
Preferably, if channel variation is faster than first threshold set in advance, Part II running time-frequency resource is using the first value； If channel variation is slower than Second Threshold set in advance, Part II running time-frequency resource uses second value, wherein the first value is more than Second value.
Disclosed herein as well is a kind of sending ending equipment, including：Resource division module and resource distribution module, wherein：
The resource division module, for the time/frequency source block for channel estimation for specifying to be divided into two parts time-frequency money Source；
The resource distribution module, for Part I running time-frequency resource to be updated for channel estimation, and by Part II Running time-frequency resource is used for the supplement that channel estimation updates.
Disclosed herein as well is a kind of reference signal receiving method, including：
The docking collection of letters number carries out spatial modulation detection, obtains the estimation of link index and the estimation of data symbol；
According to signal, the estimation of link index and the estimation of data symbol is received, data symbol is considered as reference signal, Update the channel estimation results of the link index.
Disclosed herein as well is a kind of receiving device, including：Data detection module and channel estimation module, wherein：
Data detection module, spatial modulation detection is done for docking the collection of letters number, obtains estimation and the data of link index The estimation of symbol；
Channel estimation module, for according to the estimation of link index for receiving signal, being obtained by data detection module and The estimation of data symbol, reference signal is considered as by data symbol, updates the channel estimation results of the link index.
As seen from the above technical solution, the technical scheme that the application is provided is inserted by conventional Physical Resource Block transmission Enter the Physical Resource Block for reducing reference signal expense, effectively reduce the expense caused by down physical channel training, carry The spectrum efficiency of system high.Meanwhile, scheme provided herein is applied equally to traditional spatial multiplexing, multiple antenna system System, can reduce the expense caused by system descending training, further improve the spectrum efficiency of system.
Brief description of the drawings
Fig. 1 is a kind of existing multicarrier spatial modulation system block diagram；
Fig. 2 is the system frame structure schematic diagram of the embodiment of the present application one；
Fig. 3 is reference signal transmission schematic diagram in the C-PRB of the embodiment of the present application one；
Fig. 4 is the schematic diagram of a kind of reference signal of the application and data investigation transmission；
Fig. 5 is a kind of a kind of receiving device suitable for reference signal and data investigation transmission means of the embodiment of the present application Structural representation；
Fig. 6 be the embodiment of the present application two in use data symbol as the method schematic diagram of supplementary reference signal；
Fig. 7 be the embodiment of the present application two in be applied to symbol as the transmission means of supplementary reference signal a kind of receiving terminal Device structure schematic diagram；
Fig. 8 is the resource impact and reference signal interleaved plan schematic diagram of self adaptation in the embodiment of the present application three；
Fig. 9 is a kind of schematic diagram of aperiodic insertion C-PRB in the embodiment of the present application four；
Figure 10 is the composition structural representation of the preferable sending ending equipment of the application one；
Figure 11 is the composition structural representation of the preferable receiving device of the application one；
Figure 12 is the composition structural representation of the preferable sending ending equipment of the application one；
Figure 13 is the composition structural representation of the preferable sending ending equipment of the application one.
Specific embodiment
For the object, technical solution and advantage for making the application become more apparent, develop simultaneously embodiment referring to the drawings, right The application is described in further detail.
Space-modulation technique by the use of the antenna index of data as the additional carrier of information is transmitted, compared with a single aerial system Spectrum efficiency higher can be obtained under identical bandwidth.And compared with traditional multiaerial system, space-modulation technique tool There are following advantages：1. because every data transfer need not be carried out using only in many transmitting antennas, therefore receiving terminal Synchronization between antenna；2. being only applicable single transmitting antenna and will not producing disturb between link, receiving terminal need not using complexity compared with Equalization algorithm high is shown in interference eliminating link；3. a small amount of radio-frequency channel is only needed, can be significantly reduced due to radio-frequency channel number Energy consumption problem higher caused by higher, i.e. spatial modulation is a kind of energy efficiency system higher；4. spatial modulation system exists Originator antenna number remains able to work when being more than reception antenna number.Additionally, identical spectrum efficiency can be by different antenna numbers Combination with modulation system is realized, therefore spatial modulation makes the parameter of system more flexible.Combine such as OFDM The spatial modulation system of multi-transceiver technologies such as (Orthogonal frequency division multiplexing, OFDM), Spatial modulation is done to the equivalent multi-antenna channel of frequency domain comprising multi-carrier modulation, actual physics channel, multicarrier demodulation, although funeral The less advantage of radio-frequency channel number is lost, but the bigger free degree has been obtained on the problems such as resource allocation, pilot tone are distributed, together When it is also more preferable with the compatibility of standard.
Fig. 1 is a kind of block diagram of existing multicarrier spatial modulation system, wherein, chain-dotted line left side is transmitting terminal block diagram, right Side is receiving terminal block diagram.As shown in figure 1, it is N to set transmitting terminal antenna number, order of modulation used is Q=2B, wherein B is to be mapped as One bit number of symbol.The basic handling flow of transmitting terminal is as follows：Data flow is sent with log2(NQ)=log2(N)+B ratio Specially for one group, preceding log2(N) individual bit determines to send stream index used by data, and rear B bit map is a QAM symbol Number.With N=2, as a example by B=2, the mapping relations of spatial modulation bit to spatial modulation symbol are as shown in table 1.In table 1, day clue Draw the index for representing and being currently used in the antenna for sending data.In the bit sequence of transmission, first bit is used to determine day clue Draw, latter two bit is used for the symbol for determining to send.Obtain after spatial modulation symbol, all N number of data flows are done with anti-quick Fourier transformation (Inverse Fast Fourier Transform, IFFT), obtains the data transmitted on N root transmission antennas Stream.
Table 1：Bit-symbol mapping relations
Using the space-modulation technique receiving terminal block diagram of OFDM technology as shown in Fig. 1 chain-dotted lines right side, and set receiving terminal and match somebody with somebody Standby M antenna.After reception signal is received, receiving terminal does Fast Fourier Transform (FFT) to the data flow of each reception antenna (Fast Fourier Transform, FFT), obtains frequency-region signal.If including transmitting terminal IFFT, actual physics channel, receiving End FFT is H ∈ C in interior frequency domain equivalent channel matrixM×N, then respective channel model can be written as：
Y=Hx+n
Wherein, y ∈ CM×1It is by the reception vector after FFT, x=eisj∈CN×1For send spatial modulation symbol to Amount, n ∈ CM×1It is noise vector.Vectorial ei=[0 ..., 0,1,0 ..., 0]T∈CN×1In only i-th element be 1, remaining Element is 0, represents that only i-th antenna is used for data is activation according to bit is sent.Symbol sjIt is according to transmission bit from constellation The symbol chosen in mapping symbols set, such as quadrature amplitude modulation (Quadrature Amplitude Modulation, QAM), pulse amplitude modulation (Pulse Amplitude Modulation, PAM) or phase-shift keying (PSK) (Phase Shift Keying, PSK) assemble of symbol.Therefore, receiving symbol can be abbreviated as：
Y=hisj+n
Wherein, hi∈CM×1It is the i-th row of matrix H.
Receiving terminal is detected using following maximum likelihood algorithm to sending symbol：
Obtain the estimation of transmission antenna indexWith the estimation for receiving symbolAfterwards, according to table 1 bit to symbol Mapping ruler can obtain launching the estimate of bit stream.
In addition to an only spatial modulation system for link transmission data every time described above, generalized space modulation (Generalized Spatial Modulation, GSM) system transmits a subset of the whole links of activation every time, and uses The index of the subset as transmission information carrier, and different link can transmit identical data, to improve the reliability of system Property；Or different data are transmitted, to improve the data transfer rate of system.A kind of form of spatial modulation is regarded as herein.
Be can see in from the description above, although multicarrier space-modulation technique is only activated comprising one in transmission every time The subset of bar or whole links of several, but to obtain the estimation of accurate link index, receiving terminal still needs to be known entirely The channel condition information of portion's link.When transmitting chain way is more, to make receiving terminal obtain accurate channel condition information, it is used for The reference signal of down channel training will bring notable expense, so as to influence the reachable spectrum efficiency of system.Therefore, space is adjusted Technology processed brings challenge for system descending physics channel training.
RS designs traditional in wireless communication system, such as CRS or CSI-RS in LTE-A are passed on different antennas Defeated mutually orthogonal reference signal, for example, transmit on mutually orthogonal time or frequency resource and estimate for each link channel Reference signal, or use identical time or frequency resource, but different links are distinguished using orthogonal code sequence, with true The reference signal for being used for channel estimation between protecting different links will not be interfered.Therefore, the expense of above-mentioned these reference signals with Transmitting terminal number of links is directly proportional.When number of links is more, still being designed using these traditional RS will cause larger training Expense, causes the reduction of system spectral efficiency.The problem of down physical channel reference signal expense, for traditional use space Similarly it is a problem demanding prompt solution for the mimo system of multiplexing.For multicarrier spatial modulation system, every time Data all activating part links are sent, while data are transmitted, also a large amount of unemployed links.How these are utilized Link reduces expense during descending training, is the problem that the present invention will pay close attention to.
For this problem, the present invention proposes a kind of scheme of reductions RS expenses, is used to reduce down channel train and is made Into expense, improve system spectrum efficiency.
Embodiment one：
In the present embodiment, we introduce a kind of suitable for multicarrier spatial modulation with reference to specific system parameter setting Down physical channel training program.In the present embodiment, it is considered to 256 subcarriers of a use, comprising 14 OFDM symbols Multicarrier system.Continuous 12 subcarriers constitute a Physical Resource Block (Physical in every 14 OFDM symbols Resource Block,PRB).System transmitting antenna number is that N, i.e. frequency domain equivalent channel number of links are N.
In system, PRB is divided into two classes, and the first kind is C-PRB (Conventional PRB, alternatively referred to as " tradition PRB "), i.e., it is consistent, the first Physical Resource Block in corresponding claims book with the PRB in traditional standard.On C-PRB, adopt The channel coefficients of different links are estimated with existing method, i.e., the reference signal on different links uses mutually orthogonal Running time-frequency resource.Equations of The Second Kind is R-PRB (Reduced PRB alternatively referred to as " simplify PRB "), using reduction provided by the present invention The method of reference signal expense carries out reference signal transmission.Now, system frame structure can be represented with Fig. 2.This is the equal of hair Sending end equipment inserts at least one between adjacent conventional Physical Resource Block and possesses the physics money for reducing reference signal expense Source block, and transmit conventional Physical Resource Block and the Physical Resource Block for reducing reference signal expense.
The reference of different links is transmitted using mutually orthogonal resource (including time domain, frequency domain, code domain etc.) due to C-PRB Signal, it can be considered that the channel estimation carried out on C-PRB is more accurate.Meanwhile, using the ginseng for reducing expense on R-PRB Examine signal transmission form, there is provided accuracy is slightly lower, but the relatively low channel estimation results of expense.
Specifically, mutually orthogonal time, frequency resource transmission of reference signals are used on C-PRB, with 4 link multicarriers As a example by spatial modulation, Fig. 3 shows the transmission means of reference signal on the C-PRB of the embodiment of the present application one.It can be seen that, to pass It is defeated for estimate 4 reference signals of the channel condition information of link, it is necessary to take at least four running time-frequency resources.Show shown in Fig. 3 Mutually orthogonal time resource is used in example, the biography of reference signal can also be used for using mutually orthogonal frequency resource in addition It is defeated, or identical running time-frequency resource is used, but distinguish different links using the orthogonal code sequence that mutually orthogonal, length is 4 Reference signal.The present embodiment is illustrated by taking reference signal mode shown in Fig. 3 as an example.
On R-PRB, reference signal expense is reduced by the way of data symbol is superimposed with reference signal.With shown in Fig. 44 As a example by link multicarrier spatial modulation, the R-PRB schematic diagrames corresponding to each link are depicted in figure.It can be seen that, chain in figure Black time-frequency location in road 1,2 is used to send reference signal, and reference signal is located on mutually orthogonal running time-frequency resource.For example, When link 1 sends reference signal, corresponding time-frequency location does not send any data on link 2；When link 2 sends reference signal When, corresponding time-frequency location does not send any data on link 1.At the same time, link 3,4 carries out the space tune that number of links is 2 System, according to wherein one link activation of input bit group selection, and sends corresponding symbol data.
It can be seen that, this transmission means is obtained equivalent to reference signal is overlapped with data symbol in spatial domain, with Unlike the sending method of conventional reference signal, while carrying out physics channel training, a part of data still can be sent.Though The data transfer rate for so sending is decreased, but the expense for training is also correspondingly reduced.Still with 4 link multicarrier shown in Fig. 4 As a example by spatial modulation system, it is assumed that modulation system used by system is QPSK.Not during transmission of reference signals, transmitted on each subcarrier Data transfer rate be 4bps/Hz；In the conventional way during transmission of reference signals, data cannot be transmitted on corresponding subcarrier；With this implementation During the scheme transmission reference signal that example is provided, the data transfer rate transmitted on corresponding subcarrier is 3bps/Hz, be thus be accordingly used in reference to letter Number transmission cost reduction.
Fig. 5 show a kind of possible receiving terminal of the reference signal and data investigation transmission means suitable for the present embodiment Device structure, the receiving device includes：Data extraction module, data detection module and channel estimation module, wherein：
Data extraction module, for according to reception signal, and the channel estimation knot from the Physical Resource Block of preceding n times first The result that fruit or front and rear the first Physical Resource Block of N1 frames channel estimation interpolation are obtained, obtains the rough estimate of present channel, and carry Take out spatial modulation symbol transmission part；Wherein, N is more than or equal to 1 more than or equal to 1, N1；
Data detection module, the spatial modulation symbol transmission part for being obtained to data extraction module carries out spatial modulation Detection, obtains the estimation of transmission link index and the estimation of data symbol；
Channel estimation module, for indexed according to data detection module link estimation and the estimation of data symbol, Reference signal and reception signal, update the channel estimation of respective link.
Specifically, assuming only to activate the spatial modulation mode of single link, reference signal transmission mode using transmission every time It is that to use in the orthogonal resource of time-frequency domain be different link transmission reference signals.At this time, it may be necessary to the R-PRB of transmission of reference signals On subcarrier can be expressed as in the reception signal of receiving terminal：
Y=hisj+hmp+w
Wherein, vectorial hiRepresent i-th transmitting chain to the equivalent channel coefficient vector between receives link；
sjIt is the data symbol for sending；
P is reference signal, known with receiving terminal in transmitting terminal；
W is noise vector.
The right Section 1 is spatial modulation vector in above formula, and Section 2 is the reference signal for channel estimation.
, it is necessary to the parameter estimated includes the link index i, data symbol s in spatial modulation vector in above formulajAnd need The channel vector h of estimationm, but known quantity only has reference signal p and spatial modulation vector set, it is difficult to by traditional side Method detects whole unknown numbers simultaneously.Some prior informations are now needed to aid in detection.For example, for changing slower letter Road, it is possible to use the channel estimation of preceding several PRB to current channel is predicted or estimates, and obtains channel rough estimateSo as to extract data division, i.e.,：
Signal after being extracted to data afterwards carries out Data Detection, obtains the detection of link index and data symbolWith After Data Detection, the estimation of spatial modulation vector can be removed from signal is received, carry out channel estimating operation.I.e.：
The channel estimation under signal p auxiliary is made reference to above-mentioned signal, estimated result is obtained
To obtain channel rough estimateThe C-PRB that needs close on provides accurate channel estimation.It is a kind of possible Method is that the channel rough estimate of current R-PRB is directly predicted using former frame C-PRBOr obtained using front and rear several frame C-PRB The channel estimation results for arriving, obtain channel rough estimate in current R-PRB by way of interpolationIn addition, in interpolation or prediction During, it is also possible to reference to the channel estimation results closed on obtained by R-PRB.
Be can see from above-mentioned handling process, data symbol detection depends on channel rough estimate with the order of accuarcy of channel estimation The order of accuarcy of meter.Therefore, for Quick-Change channel, C-PRB should be more frequently inserted, to improve the accurate of channel rough estimate Property.For the slow frequency for becoming channel, then can reducing insertion C-PRB, to reduce reference signal expense, frequency spectrum effect higher is obtained Rate.
It is used for the reference signal link set for sending and the link set sent for spatial modulation symbol in the present embodiment Non-overlapping, and its union constitutes the set of whole link compositions.It should be noted that above-mentioned situation is only the present embodiment The preferred version of offer, in actually used technical scheme, the union of the two link subsets will not necessarily be constituted Whole links.For example, when having high correlation between adjacent link, whole links are divided into three non-overlapping sons Collection, for the reference signal link for sending and less two of the link selection wherein correlation sent for spatial modulation symbol Link subset, and a remaining link subset does not send any signal.In addition, the reduction reference signal expense in the present embodiment Method and frame structure be equally applicable to the transmission of Traditional Space multiplexed MIMO symbol.For example, in frame structure shown in Fig. 2, C- PRB is used to transmit traditional spatial multiplexing MIMO symbol, and R-PRB uses transmission means as shown in Figure 4, wherein for transmitting The scheme that the running time-frequency resource of reference signal is provided using the present embodiment, and remaining running time-frequency resource is used to transmit Traditional Space multiplexing MIMO symbol.
Embodiment two：
In the present embodiment, we introduce a kind of suitable for multicarrier spatial modulation with reference to specific system parameter setting Down physical channel training program.Systematic parameter is identical with above-described embodiment one, and frame structure used is as shown in Figure 2.
Similar with embodiment one, C-PRB uses the method similar with conventional reference signal design, and different links are using mutual Orthogonal running time-frequency resource carries out channel estimation, used as more accurate channel estimation；And R-PRB is then using the reference for reducing expense Signal transmission form.
Fig. 6 show the reference signal transmission mode of the reduction expense that the present embodiment is provided.In Fig. 6, grid frame is represented Data, traditional reference signal is not sent in the method, but uses data symbol as supplementary reference signal, Therefore, for spatial modulation symbol, the part of non-grid frame is sky.In Fig. 6：
What lower section was denoted as " for the resource of data " transmission is the normal spatial modulation symbol for being used to transmit data；
What lower section was denoted as " for the resource trained " transmission is the spatial modulation symbol for channel training and data transfer Number；
It is for preventing some links from not estimated in the training stage that lower section is denoted as " for the resource of supplementary training " Or channel estimating performance it is poor when complement channel training tool, thereon link index do not carry information, only data symbols Number carry information.
In method shown in Fig. 6, first, sending ending equipment will be divided into two for reducing the time/frequency source block of reference signal expense Portion of time frequency resources；Then, sending ending equipment updates Part I running time-frequency resource for channel estimation, and during by Part II Frequency resource is used for the supplement that channel estimation updates.
Transmitting terminal when being modulated with resource allocation, record for train running time-frequency resource activation link index and Access times, the number of times that each link is activated is counted after training part is terminated.In the running time-frequency resource insertion for supplementary training During data, be preferably training portion of time frequency resources be not activated or activate number of times it is less link insertion data symbol, with Ensuring the channel condition information of each link can be updated, i.e.,：Sending ending equipment on Part I running time-frequency resource to being made With the access times of link carry out ascending order arrangement, be used for according to the access times link of sequential selection at least one from less to more The transmission of symbol on Part II running time-frequency resource.
Compared with the transmission of spatial modulation symbol, the transmission means of this reference signal can reduce channel training and be brought Expense.Data for training part do not lose data transfer rate, while only losing antenna and taking for the data of supplementary training part The data of band.
Fig. 7 be the embodiment of the present application two in be suitable for use with data symbol as the one of the transmission means of supplementary reference signal Plant receiving device structural representation.Channel estimation steps under receiving device structure shown in Fig. 7 include：Docking first is collected mail Data Detection number is carried out, channel information used is the channel according to preceding n times (N is more than or equal to 1) conventional physical Resource Block The channel rough estimate that obtains of estimation, or obtained by the channel estimation interpolation of front and rear N1 frames (N1 is more than or equal to 1) C-PRB Present frame channel rough estimate；After obtaining Data Detection result, the data symbol for estimating to obtain is considered as known with reference to letter Channel estimation number is carried out, the channel coefficients of transmission link are estimated, and updates the channel estimation results of the link.
In order to carry out Data Detection, it is still desirable to obtain channel rough estimateIt is similar with above-described embodiment one, to obtain Channel rough estimate is, it is necessary to the C-PRB for closing on provides accurate channel estimation.A kind of possible method is for directly using former Frame C-PRB predicts the channel rough estimate of current R-PRBOr the channel estimation results obtained using front and rear several frame C-PRB, lead to The mode for crossing interpolation obtains channel rough estimate in current R-PRBAlternatively, it is also possible to assist to carry out with reference to the R-PRB for closing on Prediction or interpolation obtain the channel rough estimate result for Data Detection.
It can be seen that, in the present embodiment, channel rough estimate when the order of accuarcy of channel estimation still depends on Data Detection Order of accuarcy.Channel rough estimate is more accurate, then Data Detection is more accurate, and it is also more accurate that channel estimation updates result.Conversely, If channel rough estimate is in respect of relatively large deviation, it is likely to result in Data Detection and produces error, and then cause that the result of channel estimation is also produced Raw error.
It is similar with embodiment one, when channel variation is very fast, may have larger for the channel rough estimate of Data Detection Error, to ensure the accuracy of channel estimation, C-PRB needs to be inserted with frequency higher；Conversely, when channel variation is slower, Channel rough estimate error for Data Detection is smaller, and now C-PRB can be inserted with relatively low frequency, to reduce reference signal Expense, obtain spectrum efficiency higher.
It should be noted that frame structure shown in Fig. 2 is equally applicable to the multi-antenna technology of spatial reuse.I.e. C-PRB is used Traditional reference signal sending method, reference signal is transmitted in mutually orthogonal resource, and resource here refers to that the time provides Source, frequency resource or orthogonal code sequence resource；And R-PRB uses can reduce the reference signal transmission method of expense, can be with Using the reference signal insertion method in embodiment one or embodiment two.
For the scheme that the present embodiment is provided, in C-PRB, reference signal still uses orthogonal resource transmission； And in R-PRB, lower section is denoted as " for the resource of data " for transmitting sky in the part for transmitting general data, i.e. Fig. 6 Between multiplexed symbols, for the part trained, i.e. lower section is expressed as " for the resource trained " and " for supplementary training in Fig. 6 Resource " scheme that is provided using the present embodiment.I.e. space-modulation technique can be used for the reference in conventional MIMO system Signal overhead reduction.
Illustrate that scheme provided herein can reduce Traditional Space multiplexed MIMO system with a simple examples below Downlink reference signal expense.Assuming that sending ending equipment is equipped with four antennas with receiving device, modulation system uses QPSK Modulation, so, data division sends can transmit 8 bit informations every time.If downlink reference signal is sent by the way of traditional, The corresponding reference signal of i.e. different links uses mutually orthogonal running time-frequency resource, so in the running time-frequency resource of transmission of reference signals On, it is impossible to send valid data.Assuming that the length of reference signal is number of links, i.e., 4, and now on 4 running time-frequency resources, data transfer rate It is 0；If the scheme as shown in Figure 6 provided using the present embodiment, it is used for descending training using 5 running time-frequency resources, wherein 3 It is individual for training, 2 are used for supplementary training, and the data symbol for transmitting thereon still modulated using QPSK.Now, each is used to instruct The running time-frequency resource for practicing part can send 4 bit informations, totally 12 bit information, and each energy of running time-frequency resource for being used for supplementary training 2 bit informations are enough sent, totally 4 bit information.The scheme that i.e. the present embodiment is used both completes channel on 5 running time-frequency resources Training, have sent 16 bit informations again.And on identical running time-frequency resource, if using conventional exercises mode, only one time-frequency money Source is used for data is activation, transmits 8 bit informations.It can be seen that, by using scheme provided herein, Traditional Space multiplexing The reference signal expense of mimo system also can be reduced substantially.
It should be noted that when receiving terminal antenna number is less than transmission antenna number, the number that space multiplexing system can be transmitted Determined by receiving terminal antenna according to fluxion, such as in above-mentioned example, if receiving terminal is equipped with only two antennas, the data for sending every time Stream is less, is only capable of transmitting 4 bits on each running time-frequency resource.Now bigger increasing is obtained in that using scheme provided herein Benefit.
Embodiment three：
The present embodiment will provide the channel condition information self-adaptative adjustment resource impact fed back according to UE and be inserted with reference signal The embodiment for entering.Fig. 8 show the resource impact of self adaptation in the embodiment of the present application three and reference signal interleaved plan is illustrated Figure.
Be can see from the first two embodiment, C-PRB is directly related with channel variation speed with the insertion frequency of R-PRB 's.Accordingly, the instruction of control C-PRB or R-PRB insertion frequencies can be defined to control the frequency of occurrences of both PRB.Specifically For, UE determines the instruction after carrying out channel estimation according to channel variation speed, if channel variation is very fast, C-PRB need with compared with Frequency insertion high, and R-PRB needs to be inserted with relatively low frequency, to ensure the accuracy of channel estimation；If channel variation compared with Slowly, C-PRB can be inserted with relatively low frequency, and the insertion frequency of R-PRB can be improved, and so be used for the reference of channel estimation Signal overhead can be reduced, and system spectral efficiency can be improved.By the indication feedback to base station, base station determines UE according to the feedback The insertion frequency of C-PRB and R-PRB, and final result is informed into UE.UE carries out channel estimation and number according to the result to channel According to detection.
The channel condition information that the corresponding scheme for reducing reference signal expense can also be fed back according to UE is adjusted.It is real The data that example one provided are applied to be superimposed with reference signal in the scheme for sending, for send spatial modulation symbol number of links and The order of modulation for sending data symbol can be adjusted according to channel condition information.For example, when channel variation is very fast, making It is used for spatial modulation with less number of links, relatively low order of modulation, to improve the reliability of Data Detection, and then improves channel The accuracy of estimation；Conversely, to transmit more data, can then be carried using more number of links and order of modulation higher System spectral efficiency high.
It is similar to therewith, uses data symbol as in the scheme of supplementary reference signal provided in embodiment two, counts The channel condition information that order of modulation according to symbol and the sub-carrier number for supplementary training part can feed back according to UE enters Mobile state is adjusted.Specifically, when channel variation is very fast, exponent number relatively low modulation system and larger supplement should be used Training sub-carrier number, to improve the accuracy of channel estimation；Conversely, then can be using exponent number modulation system higher and smaller Supplementary training sub-carrier number, to reduce the expense that channel training is brought, improve system spectral efficiency.
When base station proceeds by data communication with user, the initial reference position of C-PRB and frequency are passed through into broadcast channel Or the signaling in down control channel sends, user knows C-PRB's by read broadcast channel or down control channel Reference position and frequency, and then know the structure of whole system C-PRB and R-PRB, and it is logical with data to proceed by channel estimation Letter.In data communication process, base station dynamically adjusts the frequency of C-PRB by the channel estimation from user, and by descending control Channel processed informs user.
Example IV：
A kind of configured information of UE feedbacks will be provided in the present embodiment, for the insertion of aperiodic traditional PRB.
Structure shown in Fig. 2 is the inserted mode of a kind of periodic C-PRB and R-PRB, it is adaptable to which channel variation is more advised The scene of rule.But the scene irregular for some channel variations, the structure that Fig. 2 is given may be in continuous several R- Channel variation faster is experienced when PRB is transmitted so that data detection reliability and channel estimation accuracy decline, so as to cause The decline of systematic function.
Therefore, the present embodiment proposes a kind of acyclic C-PRB insertion methods.Fig. 9 show acyclic C-PRB Insertion schematic diagram.As shown in figure 9, two C-PRB midfeathers multiple R-PRB of cycle insertion.According to preceding several embodiments Discuss, when channel variation is more slow, this structure is obtained in that preferable error performance is opened with more relatively low reference signal Pin.But when channel variation is unstable, such as user moving speed accelerates, or it is moved in city from more open area When, channel status there occurs and significantly change, and it is accurate still will to be insufficient for channel estimation by the way of multiple R-PRB is spaced The demand of property.Now, user indicates (or request), base by ascending control channel to the insertion that base station sends aperiodic C-PRB After station receives, a R-PRB is replaced with into C-PRB, to strengthen the reliability of down channel estimation.After replacing with C-PRB, base station The insertion of C-PRB can be indicated to the user that in down control channel, it is also possible to user's agreement, send aperiodic C-PRB and insert After entering to indicate (or request) to be spaced one pre-defined time afterwards, user should detect C-PRB.
The flexibility of strengthening system is capable of in the combination that cycle C-PRB is inserted and aperiodic C-PRB is inserted, and improves system counter The ability of time varying channel.
Corresponding to the above method, present invention also provides a kind of sending ending equipment, as shown in Figure 10, the sending ending equipment bag Include：Insertion module and sending module, wherein：
Insertion module, opens for the insertion at least one between the first adjacent Physical Resource Block for reducing reference signal The Physical Resource Block of pin；
Sending module, provides for transmitting first Physical Resource Block and the physics for reducing reference signal expense Source block.
Corresponding to the above method, present invention also provides receiving device, as shown in figure 11, the receiving device includes： Receiver module, channel estimation module and data detection module, wherein：
The receiver module, the Physical Resource Block for the first Physical Resource Block of reception and for reducing reference signal expense Positional information；
The channel estimation module, for according to the first Physical Resource Block for receiving and for reducing reference signal expense Physical Resource Block carry out channel estimation；
The data detection module, for carrying out Data Detection according to channel estimation results.
Preferably, also including indicating module in the equipment；
The indicating module is used for according to current channel estimation, decides whether to be sent for indicating the to sending ending equipment The configured information of one Physical Resource Block insertion.
Corresponding to the above method, present invention also provides a kind of sending ending equipment, as shown in figure 12, the sending ending equipment bag Include：Reference signal sending module and modulation symbol sending module, wherein：
The reference signal sending module, for sending the ginseng for channel estimation in the first link subset of transmission link Examine signal；
The modulation symbol sending module, spatial modulation symbol is sent for the second link subset in transmission link；
Wherein, the reference signal sending module and modulation symbol sending module carry out signal on identical running time-frequency resource Send, also, the first link subset includes at least one transmission link in whole transmission links, the second link subset includes complete At least one transmission link in portion's transmission link.
Corresponding to the above method, present invention also provides a kind of sending ending equipment, as shown in figure 13, the sending ending equipment bag Include：Resource division module and resource distribution module, wherein：
The resource division module, for the time/frequency source block for channel estimation for specifying to be divided into two parts time-frequency money Source；
The resource distribution module, for Part I running time-frequency resource to be updated for channel estimation, and by Part II Running time-frequency resource is used for the supplement that channel estimation updates.
The preferred embodiment of the application is the foregoing is only, is not used to limit the application, all essences in the application Within god and principle, any modification, equivalent substitution and improvements done etc. should be included within the scope of the application protection.

Claims (31)

1. a kind of reference signal sending method, it is characterised in that methods described includes：
Sending ending equipment inserts at least one between the first adjacent Physical Resource Block is used to reduce the thing of reference signal expense Reason Resource Block；
Sending ending equipment transmits first Physical Resource Block and the Physical Resource Block for reducing reference signal expense.
2. method according to claim 1, it is characterised in that：
In the Physical Resource Block for reducing reference signal expense, at least one reduction in the following ways is with reference to letter Number expense：
Sending ending equipment sends the reference signal for channel estimation in the first link subset of transmission link, and in transmission link The second link subset send spatial modulation symbol；Wherein, described being sent on identical running time-frequency resource is carried out, also, first Link subset includes at least one transmission link in whole transmission links, and the second link subset is included in whole transmission links At least one transmission link；
Sending ending equipment will be divided into two parts running time-frequency resource for reducing the Physical Resource Block of reference signal expense, by Part I Running time-frequency resource is updated for channel estimation, and Part II running time-frequency resource is used for into the supplement that channel estimation updates.
3. method according to claim 1 and 2, it is characterised in that the method also includes：
Sending ending equipment by the position of default first Physical Resource Block with for reducing the Physical Resource Block of reference signal expense Insertion frequency be sent to receiving device；
And/or, sending ending equipment is by the first Physical Resource Block and position for reducing the Physical Resource Block of reference signal expense It is sent to receiving device.
4. the method according to any one of claims 1 to 3, it is characterised in that the method also includes：
From receiving device receiving channel state information, and determined for reducing reference signal expense according to channel condition information The insertion frequency of Physical Resource Block；
And/or, the configured information for indicating the first Physical Resource Block of insertion is received from receiving device, described at least one For inserting the first Physical Resource Block between the Physical Resource Block for reducing reference signal expense and sending configured information to receiving terminal, Or the first thing between described at least one being used to reduce the Physical Resource Block of reference signal expense after the time of interval setting Reason Resource Block.
5. method according to claim 4, it is characterised in that described to be determined to refer to for reducing according to channel condition information The insertion frequency of the Physical Resource Block of signal overhead includes：
If channel variation is faster than first threshold set in advance, inserted for reducing reference signal using the first insertion frequency The Physical Resource Block of expense；If channel variation is slower than Second Threshold set in advance, use is inserted using the second insertion frequency In the Physical Resource Block for reducing reference signal expense；Wherein, the first insertion frequency is less than or equal to the second insertion frequency.
6. a kind of sending ending equipment, it is characterised in that including：Insertion module and sending module, wherein：
Insertion module, is used to reduce reference signal expense for the insertion at least one between the first adjacent Physical Resource Block Physical Resource Block；
Sending module, for transmitting first Physical Resource Block and the physical resource for reducing reference signal expense Block.
7. a kind of reference signal receiving method, it is characterised in that including：
Receiving device receives the first Physical Resource Block and the positional information for reducing the Physical Resource Block of reference signal expense；
Receiving device enters according to the first Physical Resource Block for receiving and for reducing the Physical Resource Block of reference signal expense Row channel estimation；
Receiving device carries out Data Detection according to channel estimation results.
8. method according to claim 7, it is characterised in that：
The method also includes：Receiving device decides whether to be sent for indicating to sending ending equipment according to channel estimation results Insert the configured information of the first Physical Resource Block.
9. method according to claim 8, it is characterised in that：
If the result of channel estimation shows that channel variation is faster than threshold value set in advance, receiving device is sent out to sending ending equipment Send the configured information for indicating the first Physical Resource Block of insertion.
10. the method according to any one of claim 7 to 9, it is characterised in that：
The method also includes：Receiving device receives the insertion that configured information knows the first Physical Resource Block from sending ending equipment, And start to detect the first Physical Resource Block；Or, receiving device is sent for indicating the first physics to provide to sending ending equipment After the configured information of source block insertion, start to detect the first Physical Resource Block after being spaced the time of setting.
11. methods according to claim 10, it is characterised in that：
The time of the setting determines according at least one of following information：Radius of society, receiving device and sending ending equipment Processing speed.
A kind of 12. receiving devices, it is characterised in that including：Receiver module, channel estimation module and data detection module, its In：
The receiver module, the position for the first Physical Resource Block of reception and for reducing the Physical Resource Block of reference signal expense Confidence ceases；
The channel estimation module, for the thing according to the first Physical Resource Block for receiving and for reducing reference signal expense Reason Resource Block carries out channel estimation；
The data detection module, for carrying out Data Detection according to channel estimation results.
13. equipment according to claim 12, it is characterised in that：Also include indicating module in the equipment；
The indicating module is used for according to current channel estimation, decides whether to be sent for indicating the first thing to sending ending equipment The configured information of reason Resource Block insertion.
The sending method of reference signal in a kind of 14. Physical Resource Block for reducing reference signal expense, it is characterised in that bag Include：
Sending ending equipment sends the reference signal for channel estimation in the first link subset of transmission link, and in transmission link The second link subset send spatial modulation symbol；
Wherein, described being sent on identical running time-frequency resource is carried out, also, the first link subset is including in whole transmission links At least one transmission link, the second link subset includes at least one transmission link in whole transmission links.
15. methods according to claim 14, it is characterised in that：
First link subset and the second link subset non-overlapping.
16. method according to claims 14 or 15, it is characterised in that：
Sending ending equipment sends reference signal using mutually orthogonal resource in the first link subset, and the resource includes following At least one of resource：Time resource, frequency resource, orthogonal code sequence resource.
17. method according to any one of claim 14 to 16, it is characterised in that：
The method also includes：Sending ending equipment is determined from receiving device receiving channel state information according to channel condition information The number of links that fixed first link subset is included respectively with the second link subset.
18. methods according to claim 17, it is characterised in that：
If channel variation is faster than first threshold set in advance, the first chain is included in the first link subset and the second link subset Way；If channel variation is slower than Second Threshold set in advance, second is included in the first link subset and the second link subset Number of links, wherein the first number of links is less than the second number of links.
A kind of 19. sending ending equipments, it is characterised in that including：Reference signal sending module and modulation symbol sending module, its In：
The reference signal sending module, for sending the reference letter for channel estimation in the first link subset of transmission link Number；
The modulation symbol sending module, spatial modulation symbol is sent for the second link subset in transmission link；
Wherein, the reference signal sending module and modulation symbol sending module carry out signal hair on identical running time-frequency resource Send, also, the first link subset includes at least one transmission link in whole transmission links, the second link subset is included all At least one transmission link in transmission link.
A kind of 20. reference signal receiving methods, it is characterised in that including：
Receive the first Physical Resource Block and the Physical Resource Block for reducing reference signal expense；
According to reception signal, and the channel estimation results from the Physical Resource Block of preceding n times first or the front and rear thing of N1 frames first The result that reason Resource Block channel estimation interpolation is obtained, obtains the rough estimate of present channel, and extract spatial modulation symbol transmission Part；Wherein, N is more than or equal to 1 more than or equal to 1, N1；
Spatial modulation symbol transmission part to obtaining carries out spatial modulation detection, obtains estimation and the number of transmission link index According to the estimation of symbol；
The estimation of estimation and data symbol according to link index, reference signal and signal is received, update respective link Channel estimation.
A kind of 21. receiving devices, it is characterised in that including：Data extraction module, data detection module and channel estimation mould Block, wherein：
Data extraction module, for according to receive signal, and the channel estimation results from the Physical Resource Block of preceding n times first or The result that the first Physical Resource Block of N1 frames channel estimation interpolation is obtained before and after person, obtains the rough estimate of present channel, and extract Spatial modulation symbol transmission part；Wherein, N is more than or equal to 1 more than or equal to 1, N1；
Data detection module, the spatial modulation symbol transmission part for being obtained to data extraction module carries out spatial modulation inspection Survey, obtain the estimation of transmission link index and the estimation of data symbol；
Channel estimation module, for the estimation and the estimation of data symbol, the reference that are indexed according to data detection module link Signal and reception signal, update the channel estimation of respective link.
The sending method of reference signal in a kind of 22. Physical Resource Block for reducing reference signal expense, it is characterised in that bag Include：
Sending ending equipment will be divided into two parts running time-frequency resource for reducing the time/frequency source block of reference signal expense；
Sending ending equipment updates Part I running time-frequency resource for channel estimation, and Part II running time-frequency resource is used for into channel Estimate the supplement for updating.
23. methods according to claim 22, it is characterised in that：
Part I running time-frequency resource and Part II running time-frequency resource non-overlapping.
24. method according to claim 22 or 23, it is characterised in that：
Sending ending equipment on Part I running time-frequency resource, only transmission space modulation symbol.
25. method according to any one of claim 22 to 24, it is characterised in that：
The method also includes：The chain that the spatial modulation symbol transmitted on sending ending equipment statistics Part I running time-frequency resource is used Road and access times, determine to be used for the link set for transmitting symbol on Part II running time-frequency resource accordingly.
26. methods according to claim 25, it is characterised in that：
The method also includes：The access times of link of the sending ending equipment to being used on Part I running time-frequency resource carry out ascending order Arrangement, the biography of symbol on Part II running time-frequency resource is used for according to the access times link of sequential selection at least one from less to more It is defeated.
27. method according to any one of claim 22 to 26, it is characterised in that：
The method also includes：The channel condition information that sending ending equipment feeds back according to receiving device determines Part II time-frequency money The size in source, and notify receiving device.
28. methods according to claim 27, it is characterised in that：
If channel variation is faster than first threshold set in advance, Part II running time-frequency resource is using the first value；If channel variation Second Threshold set in advance is slower than, then Part II running time-frequency resource uses second value, wherein the first value is more than second value.
A kind of 29. sending ending equipments, it is characterised in that including：Resource division module and resource distribution module, wherein：
The resource division module, for the time/frequency source block for channel estimation for specifying to be divided into two parts running time-frequency resource；
The resource distribution module, for Part I running time-frequency resource to be updated for channel estimation, and by Part II time-frequency Resource is used for the supplement that channel estimation updates.
A kind of 30. reference signal receiving methods, it is characterised in that including：
The docking collection of letters number carries out spatial modulation detection, obtains the estimation of link index and the estimation of data symbol；
According to signal, the estimation of link index and the estimation of data symbol is received, data symbol is considered as reference signal, updated The channel estimation results of the link index.
A kind of 31. receiving devices, it is characterised in that including：Data detection module and channel estimation module, wherein：
Data detection module, spatial modulation detection is done for docking the collection of letters number, obtains estimation and the data symbol of link index Estimation；
Channel estimation module, for the estimation according to the link index for receiving signal, being obtained by data detection module and data The estimation of symbol, reference signal is considered as by data symbol, updates the channel estimation results of the link index.
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